Megaraid PERC4 check consistency problem

[Peter Kjellstrom]

On Tuesday 11 September 2007, Dr. David Alan Gilbert wrote:
> * Patrick_Boyd at Dell.com (Patrick_Boyd at Dell.com) wrote:
> > If nothing else is wrong it would most likely be parity errors. This can
> > be caused by power loss.
>
> Well it's not had power loss this year and the errors have only started
> happening in the last two weeks.

Note that "fixing" a mismatching parity (if that is what it is) typically 
destroys data. Since the controller cant know which chunk in the stripe is 
the faulty one most controllers simply update the parity and says "all 
fixed"... Statistically however, the problem was one of the data chunks and 
not the parity chunk.

/Peter
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